Lythrum
Purple Loosestrife
By Megan Vahl
Lythrum salicaria
'Robert'
Easy to grow, these often
invasive plants enjoy moist
places near ponds and
streams. Of the many plants
with this common name, some
are low ground covers, good in
hanging pots, and others are tall
and make good cut flowers.
Best grown in harsh northern climates or dry West where cold or drought prevents it from becoming weedy. Buy in containers or divide for new plants. Some purple loosestrife are so invasive they're illegal in some counties. Even in many states, this plant is illegal to sell because of its destructive capability. It's not just that it's everywhere: it's that it kills native species on which birds feed, and can grow so thick as to trap wildlife.
Check about restrictions in your area.
Lythrum salicaria 'Robert'
Type of Plant: Herbaceous Perennial
Flower Color: Purple
Blooming Season: Mid-Summer to Late Summer
Foliage: Evergreen or Deciduous
Height: 2' 6" to 3'
Width: 1' 6" to 2'
Sunlight: Full Sun, Partial Sun
Zones: 4 to 9
Some other sites to get more information concerning this perennial plant:
Northern Prairie Research Center
http://www.npwrc.usgs.gov/resource/1999/vascplnt/species/lsal.htm
Garden Web
http://www.gardenweb.com/plants/nph-ind.cgi
DNR
http://www.dnr.state.in.us/news-rel/jul16-98.htm
Cornell University Studies
http://www.dnr.cornell.edu/bcontrol/purple.htm
Boston Herald
http://www.bostonherald.com/bostonherald/life/23dirt1.htm
Colorado Weed Management Association
http://www.fortnet.org/CWMA/nonative.htm